简介:China'surbanpopulationexceededruralpopulationforthefirsttimeinChinesehistory,reaching51.27%in2011.However,thelevelofurbanizationhasbeenexaggerated.Ifdeductingthelandlesspeasantsunderforcedurbanizationandmigrantworkersbeingnottreatedequallyinthecities,China'sactualurbanizationlevelstoodat41.6%.Therearechallengesahead.Forexample,anurbansocialvaluesystemhasnotbeenestablishedinoursociety;wedon'thaveaclearunderstandingoftheroleofcitiesandhowtodevelopacity;urbanmanagementhasnotpreparedwellforurbanizationdevelopment;andthereisalongwaytogoinachievingequaltreatmentforalloftheUrbanresidents.Tocopewiththechallengesofurbanization,weneedtoimprovethequalityofurbanization,correctlyunderstandtheroleofurbanizationanditssubstance,followthelawoftheurbandevelopment,andtoexplorebuildingofanurbanculturesystem.
简介:AccordingtoXinhuaNet,Chinahasapproved10citiesandtownstostartthepilotprojectofbuildinghealthycitiesandtowns.Accordingtopreliminarystatistics,sixprovinceshavealreadydevelopedactivityplanorprogramsfortheproject,and25prefecture-levelcitieshavealreadystartedtheprojectaccordingtopreviousplanning.
简介:Thebasicintentionofrealismoilpaintingistopresentascloselyaspossibletheoriginalformofeachobjectwithoutbiasorpersonalopinion,usingpictorialsimulationtechniquessuchaspoints,lines,zonesandcolors.Inordertoreproducetheobject'soriginalformortosimulateitasfaithfullyashecan,the
简介:AccordingtoChinaNewsNet,alarge-scalebirthcohortstudy,inlinewithinternationalnorms,willbestartedinthesecondhalfthisyearinShanghai,andinfullexpandsnextsummer.ItisreportedthattheprojectwillbeledbyProfessorZhangJun,directorofDepartmentofEnvironmentandChildren'sHealthofShanghaiXinhuaHospitalandShanghaiKeyLaboratory.
简介:摘要:本文首先介绍变压器套管结构,通过变压器套管介损试验分析变压器运行存在的问题,最后分析现场试验注意的事项。关键词:变压器;套管介损;试验;受损前言:电介质在电压作用下,由于电导、极化、电晕和局部放电,会产生一定的能量损耗,这些损耗总称为介质损耗(简称“介损”)。绝缘介质损耗的大小,实际上是绝缘性能优劣的一种表示。同一台设备,绝缘良好,介质损耗就小;绝缘受潮劣化,介质损耗就大。介质损耗因数tgδ是反映绝缘介质损耗大小的特性参数,测量tgδ值(习惯上称为“介损试验”)是判断电气设备绝缘状态的一项灵敏有效的方法,测量和监控各种电力设备绝缘的tgδ值已成为电力系统中绝缘预防性试验的最重要项目之一,因此,通过110kV变压器套管介损试验,企业可以及时发现变压器运行存在的诸多问题,采取有效的方法防止介损扩大.....
简介:摘要:本文就建筑施工现场临时用电系统管理中存在的主要问题及保护途径与同行进行沟通交流,不断提高建筑施工现场临时用电系统的安全系数,想方设法确保施工现场临时用电的安全。关键词:施工现场临时用电安全管理要点在建筑施工现场,通常需要构建的临时用电系统。这种临时用电系统存在着很多问题,必须注意通过保护途径进行有效的防护,才能确保建筑施工现场临时用电的安全,有效降低安全事故的发生几率。因此,我们应该高度重视建筑施工现场临时用电系统的管理工作,通过科学、安全、有效的保护途径,确保施工现场临时用电系统的安全性、稳定性和可能性,降低临时用电系统带来的安全风险......